Redundancy means having duplicate components (power supplies, network links, even whole servers) so if one fails, another takes over. In a trading server context, redundancy is built into data centers and hosting plans to prevent a single failure from stopping your robots. For example, many providers duplicate network connections through different carriers, and some mirror your VPS state to a second machine. Redundancy is the underpinning of high availability: it ensures that no single hardware fault will crash your trading operations.

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